Results 91 to 100 of about 101,033 (289)
Advanced Science, EarlyView.We demonstrate the covalent bonds strategy to enhance the mechanical property of PBIA fiber by using interfacial MXene‐NH2 nanosheets. The MXene‐NH2 nanosheets with reactive amino sites that can serve as nucleating agents and chain anchors to enhance orientation, crystallinity and interchain interaction of PBIA fiber via strong interfacial amido ...
Boyuan Chen +7 more
wiley +1 more source
Machine Learning Accelerates Crystallization for Structure Determination
Angewandte Chemie, EarlyView.Single‐crystal x‐ray diffraction (SCXRD) is often constrained by the difficulty of obtaining suitable crystals. Here, a machine learning‐accelerated co‐crystal discovery workflow is established for a crystalline mate strategy that achieves over 95% prediction accuracy and experimentally delivers 114 co‐crystals from 120 candidates.
Cui‐Zhou Luan +10 more
wiley +2 more sources
Radiation-driven Destruction of N-heterocycles in the Presence and Absence of Water Ice
The Astrophysical JournalSimple N -heterocycles are expected to be an abundant class of molecules within the interstellar medium, and increasingly complex heterocycles (e.g., nucleobases) have been detected within meteoritic organic material and in samples returned from the ...
Patrick D. Tribbett +4 more
doaj +1 more source
Defence TechnologyFrom the standpoint of chemical structures, the organic backbones of energetic materials can be classified into aromatic rings, nonaromatic rings, and open chains.
Man Xu +4 more
doaj +1 more source
Synthesis of Oxygen Heterocycles via Aromatic C-O Bond Formation Using Arynes
Molecules, 2015 Most of the synthetic approaches to the benzo-fused heterocycles containing an oxygen atom have involved the use of phenol derivatives as a starting material.
Hideto Miyabe
doaj +1 more source
Enzymatic functionalization of carbon-hydrogen bonds [PDF]
, 2011 The development of new catalytic methods to functionalize carbon–hydrogen (C–H) bonds continues to progress at a rapid pace due to the significant economic and environmental benefits of these transformations over traditional synthetic methods.
Arnold, Frances H. +2 more
core +1 more source
Chemical and Pharmaceutical Bulletin, 2000 Elucidation of mechanisms and discovery of novel reactions are interconnected, as four research chapters from the Munich laboratory demonstrate. 1) In a new opening of the furan ring, 2-methoxyfuran and tetra-acceptor-substituted ethylenes furnish methyl acrylates, which are cis-3-substituted by a cyclopropyl ring that bears the four acceptor groups ...
openaire +3 more sources
Advanced Science, EarlyView.We developed a series of quinoxalinoquinoxaline (QQ) photosensitizers featuring high and tunable excited‐state reduction potentials (E(PC•+/PC*) = –1.76 to –2.05 V vs. SCE). Their hydrogen‐bonding interaction with carbonyl substrates enables selective single‐electron transfer events for selective nitrilization of 1° amides, offering a tunable ...
Seongwoo Bae, Dongwook Kim, Jinwoo Kim
wiley +1 more source
Angewandte Chemie, EarlyView.By modulating the topological structures of two N‐heterocycle‐based covalent organic frameworks, Phen‐TTA with a kgd‐v topology exhibits narrower optical bandgap, lower exciton binding energy, and faster charge‐carrier kinetics compared to O‐TTA with an hcb topology.
Lei Wang +9 more
wiley +2 more sources
Reaction of Group III Biheterocyclic Complexes [PDF]
, 2009 Group III alkyl complexes supported by a ferrocene diamide ligand (1,1′-fc(NSitBuMe_2)_2) have been found to be reactive toward aromatic N-heterocycles such as 1-methylimidazole and pyridines.
Benitez, Diego +6 more
core +1 more source